JUST TAKE PREMIUMS

Last week I 27/09/2017 I had a conversation with a lady at the call Centre and she confirmed the amount that will be deducted on 2/10/2017. This morning when I went into my bank account I saw that they took a double premium. We where not even notified of anything that a double premium will be deducted they just took the money. We work according to a budget. How can you just take double premium if you did not even send out a notification or anything. I spoke to someone at the call Centre in the beginning of September they confirmed that my husbands previous employer did not send in the withdrawal so they sent the premium request to the employer and no one confirmed anything that the premium was unpaid or anything. I want this sorted out urgently....